Question

2x^2 - x - 21 factorize​

Answer 1

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Answer 2

Answer:

$x = \frac{7}{2} \\ x = - 3$

step by step :-

$2 {x}^{2} - x - 21$

$2 {x}^{2} + 6x - 7x - 21$

$2x(x + 3) - 7(x + 3)$

$(x + 3)(2x - 7)$

$x = - 3 \\ x = \frac{7}{2}$

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